On prepaid,
1. Tata Photon for mobile is available for Rs. 99, with data tariff at Rs. 0.5/MB;
2.The first recharge of Rs. 98, users get 10GB free data usage for 2 months on all High Speed Internet Access enabled handset they buy, provided the RUIM (ironically, a Re-Usable Identification Module, like a SIM Card), is not removed, and used on another device.